How many times do you see an animal as a main character, or a character that the story is focused on? Answer, not to many. Some of the very few films that do that are Jurassic Park, Howard the Duck, and The Jungle book, come to my mind right away. Why? I can't really say. It's just one of these weird things that I think of while being a film student. Is it weird to everyone else? Yes. Do people think that I am weird for thinking about it? Yes. But ya know what? No one else thinks about it.
This is one of those topics that can come up between myself and other film students. The reason that it does, is because we have run out of other things to talk about. It does seem weird to everyone else, but we enjoy it because, again how often do you see this, or how many times do you get to talk about what the animals represent instead of people.
Now when you readers (if there are any of you), who will read this, will start to think about this now. Don't get me wrong it seems logic to think about this, if you must. In the words of NIKE, "Just do it!"